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At least 901 records · Page 50Linked to original sources
PubMed1999

Orthodontic treatment of openbite and deepbite high-angle malocclusions.

The aim of the investigation was to assess the effect of orthodontic treatment on dentoskeletal morphology in children with openbite and deepbite high-angle malocclusion. Subjects (n = 54) in the mixed dentition with a hyperdivergent mandibular plane angle (high-angle, NSL/ML > or =40 degrees) were surveyed. Pre- and posttreatment lateral roentgenographic cephalograms were analyzed. Subjects were divided into three subgroups according to the amount of pretreatment overbite: < 0 mm = insufficient/no compensation (openbite); 0-4 mm = acceptable compensation (normal overbite); >4 mm = overcompensation (deepbite). Pretreatment, 20% of the high-angle cases exhibited insufficient dentoskeletal compensation (overbite <0 mm), and 35% displayed overcompensation (overbite >4 mm). Influences of habits such as lip sucking and tongue-thrust swallowing were more common in the openbite group. No major difference in treatment approach could be found between subgroups. In 82% of the openbite group and 90% of the deepbite group, overbite was corrected by orthodontic treatment. The mandibular plane angle was unaffected in both groups. The mechanisms of overbite correction differed between groups. The openbite group exhibited a significant decrease in interjaw-base angle. Increases in anterior and posterior dentoalveolar heights were comparable. The deepbite group showed no significant changes in skeletal morphology. The increase in dentoalveolar height was approximately twice as large posteriorly as anteriorly. The majority of children (80%) with high-angle morphology had a positive pretreatment overbite, thus exhibiting compensation of jaw-base hyperdivergency. Orthodontic treatment of high-angle malocclusions did not influence the mandibular plane angle in openbite or deepbite cases. Overbite correction was accomplished by tipping the maxilla downward anteriorly in openbite subjects, and by controlling incisor eruption in deepbite subjects.

Cephalometry↗
PubMed2005

Bone response to different strength orthodontic forces in animals with periodontitis.

BACKGROUND: Occlusal alterations resulting from tooth movements caused by periodontitis-related bone loss are often corrected with orthodontic treatments. Although the outcome is usually satisfactory, a quantitative histomorphometric study of bone response would contribute to improving treatment planning and optimizing results. METHODS AND RESULTS: This study is a histomorphometric analysis of alveolar bone response to 51 and 75-g orthodontic forces applied to rat molars subjected to experimental periodontitis by placing a ligature around the neck of the molar during 48 h. The orthodontic device consisted of two bands with a tube welded to their palatine aspect, through which the arms of a helicoidal spring were threaded so as to exert force toward palatine. The device was placed immediately and 48 h after removing the ligatures. When applied 48 h post-removal of the ligature, both orthodontic forces caused an increase in bone volume in the periodontitis group. CONCLUSIONS: Our study shows that application of orthodontic forces once periodontal infection has been controlled contributes to increasing alveolar bone volume, consequently improving bone quality.

Alveolar Bone Loss↗
PubMedDate not supplied

[Clinical case. Correction of Angle Class I with biprotrusion].

The presentation of this case report shows the dentoalveolar and soft tissue alterations produced by Orthodontic treatment. Mechanic sequence included sectional arches and were planned according to the Bioprogressive Therapy. The cephalometric assessment (Ricketts analysis and superimpositions) demonstrates all changes produced by treatment as well as those influenced by growth.

Cephalometry↗
PubMed2000

Space for missing maxillary lateral incisors--orthodontic perceptions.

Historically there has been a long-standing debate regarding the orthodontic management of dentitions with missing maxillary lateral incisors. Whether to provide space for prosthetic replacements or to close space utilizing the canines as substitute lateral incisors are the options of treatment planning for an individual. This presentation is directed at the orthodontic management of those patients who were orthodontically treated in the past by providing space for replacement lateral incisors and now at dental maturity or even later, seek a prosthetic replacement in the form of an osseointegrated fixture. In many instances there will be inadequate interradicular bone space and yet at the time of debanding adequate space often was present and now some years hence the patient is faced with orthodontic re-treatment to provide that space again. Whilst that is a challenge in itself, there is a further apparent problem to be met for those younger patients requiring space opening mechanics in deciding upon and implementing at the debanding phase, the form of retention that will hold the teeth and the roots firmly in position until the time is right for an osseointegrated fixture to be placed and treatment finalized.

Adolescent↗
PubMedDate not supplied

[The surgical treatment of mandibular prognathism after the elimination of congenital clefts of the upper lip and palate].

In 4.47% of observation in patients after liquidation of the cleft lip and the palate the lower prognathia is diagnosed. From 77 patients being operated for lower prognathia such kind of patients were 7. The subsequence of the treatment measures is the following: correction of the upper jaw on the basis of compactostetomy and it's subsequent widening with orthodontic devices. In case of impossibility of sufficient widening of the dental arch the removable dental prosthesis is made for application on the upper jaw with doubling dental row accounting achievement of the desired bite. At the second stage the osteotomy of the upper jaw brunch and sagittal removement of the central section back are carried out up to achievement of the neutral bite. In dependence on jaw sagittal removement degree operative treatment may be performed by the intravial (I degree) or extravial method (II-III progemy degrees). Quite satisfactory remote results are presented. The paper is illustrated by 4 figures. The list of literature is given.

Adolescent↗